US3371747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Priority call control for an elevator system
Assignee: Dover Corp
•
Filing: 1964-06-12
•
Granted: 1968-03-05
•
Expires: 1984-06-12
Abstract
No abstract record available.
Inventors
- 👤 John A Gingrich
- 👤 Gordon A Holland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:11
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/02; B66B1/06; B66B1/14; B66B1/18; B66B1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2347054A
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US2624425A
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US2688384A
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US2771160A
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US2795295A
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US3051268A
Cited
US3065825A
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US3187843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |